Zakaria Lahrar, of Dee Close, was today sentenced to 14 years imprisonment for his role in the killing.
Lahrar was present when another man, Daniel Boakye, 31, of Western Green, Dagenham, carried out the attack.
The pair had gone into a property in Eden Green in August 2017 and Boakye attacked Mr Adger with a machete as he sat in a chair.
Mr Adger tried to flee but they followed him outside and Boakye continued the attack in front of a number of passers-by.
Some of them tried to give Mr Adger first aid but he passed away in an ambulance on the way to hospital.
Boakye and Lahrar, meanwhile, drove from the scene in separate vehicles.
Lahrar was caught on CCTV meeting another man, Connal Cocker-Dawkins, at a hotel in Grays shortly after the murder.
Cocker-Dawkins, 20, of Denmark Street, Plaistow, was found not guilty of conspiracy to murder but had admitted conspiring to supply cocaine. He was jailed for three years after the murder trial was completed at Basildon Crown Court in March.
Boakye (pictured below) will be sentenced at a later date, after pleading guilty to murder and conspiracy to supply cocaine.
Senior investigating officer, Detective Chief Inspector Daniel Stoten, of the Kent and Essex Serious Crime Directorate, said “Lahrar and Boakye conspired to attack Mr Adger and inflicted terrible wounds upon him that led his death.
“Boakye set upon Mr Adger, hitting him with a machete. He chased him from a local home into a public street and continued his vicious assault on full view of the public.
“I would like to once again, thank the members of public who bravely ran to help Mr Adger, providing him help, care, and comfort in his last moments.
“Both men are dangerous individuals and today, Lahrar, has been sent to prison for many years. The community is a safer place without him.
“I hope that today’s outcome offers some comfort to Mr Adger’s family during this difficult time.”Tags: Dagenham, Plaistow, Upminster, South Ockendon
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